ok. well the way i tuned my dish was completely by hand, and with the aid of my nearby tv. first i set by the default transponder signal as high as it will go,
then i set using the manual tuning at one of the horizontal transponders which is a lot more sensitive for me at slighter movement, change it to 11876 h and try adjusting the elevation and azimuth by this method (tho adjust one at a time!).
i seriously suggest you dont try it tho unless its easy to adjust the dish in small movements, as i have no idea what the fasteners are like on your dish.
you might well be able to see changes with your skew using 11876 too.
i think if all fails you need to get better equipment, or call in a professional before deciding on equipment problems.
let me know how you get on..
you can follow through my dish installation with 11876 h at my site
http://connect.to/skysweden.
although i have a good signal from a small dish, moving my lnb by 5 mm either way also causes me to totally lose 2d!